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Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * fs/bfs/inode.c | |
3 | * BFS superblock and inode operations. | |
69688262 | 4 | * Copyright (C) 1999-2006 Tigran Aivazian <tigran@aivazian.fsnet.co.uk> |
1da177e4 | 5 | * From fs/minix, Copyright (C) 1991, 1992 Linus Torvalds. |
fac92bec AS |
6 | * |
7 | * Made endianness-clean by Andrew Stribblehill <ads@wompom.org>, 2005. | |
1da177e4 LT |
8 | */ |
9 | ||
10 | #include <linux/module.h> | |
11 | #include <linux/mm.h> | |
12 | #include <linux/slab.h> | |
13 | #include <linux/init.h> | |
14 | #include <linux/fs.h> | |
15 | #include <linux/smp_lock.h> | |
16 | #include <linux/buffer_head.h> | |
17 | #include <linux/vfs.h> | |
18 | #include <asm/uaccess.h> | |
19 | #include "bfs.h" | |
20 | ||
69688262 | 21 | MODULE_AUTHOR("Tigran Aivazian <tigran@aivazian.fsnet.co.uk>"); |
1da177e4 LT |
22 | MODULE_DESCRIPTION("SCO UnixWare BFS filesystem for Linux"); |
23 | MODULE_LICENSE("GPL"); | |
24 | ||
25 | #undef DEBUG | |
26 | ||
27 | #ifdef DEBUG | |
28 | #define dprintf(x...) printf(x) | |
29 | #else | |
30 | #define dprintf(x...) | |
31 | #endif | |
32 | ||
8c85e125 | 33 | static void bfs_write_super(struct super_block *s); |
f433dc56 | 34 | void dump_imap(const char *prefix, struct super_block *s); |
1da177e4 | 35 | |
e33ab086 | 36 | struct inode *bfs_iget(struct super_block *sb, unsigned long ino) |
1da177e4 | 37 | { |
f433dc56 | 38 | struct bfs_inode *di; |
e33ab086 | 39 | struct inode *inode; |
f433dc56 | 40 | struct buffer_head *bh; |
1da177e4 LT |
41 | int block, off; |
42 | ||
e33ab086 DH |
43 | inode = iget_locked(sb, ino); |
44 | if (IS_ERR(inode)) | |
45 | return ERR_PTR(-ENOMEM); | |
46 | if (!(inode->i_state & I_NEW)) | |
47 | return inode; | |
48 | ||
f433dc56 | 49 | if ((ino < BFS_ROOT_INO) || (ino > BFS_SB(inode->i_sb)->si_lasti)) { |
1da177e4 | 50 | printf("Bad inode number %s:%08lx\n", inode->i_sb->s_id, ino); |
e33ab086 | 51 | goto error; |
1da177e4 LT |
52 | } |
53 | ||
f433dc56 | 54 | block = (ino - BFS_ROOT_INO) / BFS_INODES_PER_BLOCK + 1; |
1da177e4 LT |
55 | bh = sb_bread(inode->i_sb, block); |
56 | if (!bh) { | |
f433dc56 DV |
57 | printf("Unable to read inode %s:%08lx\n", inode->i_sb->s_id, |
58 | ino); | |
e33ab086 | 59 | goto error; |
1da177e4 LT |
60 | } |
61 | ||
62 | off = (ino - BFS_ROOT_INO) % BFS_INODES_PER_BLOCK; | |
63 | di = (struct bfs_inode *)bh->b_data + off; | |
64 | ||
f433dc56 | 65 | inode->i_mode = 0x0000FFFF & le32_to_cpu(di->i_mode); |
fac92bec | 66 | if (le32_to_cpu(di->i_vtype) == BFS_VDIR) { |
1da177e4 LT |
67 | inode->i_mode |= S_IFDIR; |
68 | inode->i_op = &bfs_dir_inops; | |
69 | inode->i_fop = &bfs_dir_operations; | |
fac92bec | 70 | } else if (le32_to_cpu(di->i_vtype) == BFS_VREG) { |
1da177e4 LT |
71 | inode->i_mode |= S_IFREG; |
72 | inode->i_op = &bfs_file_inops; | |
73 | inode->i_fop = &bfs_file_operations; | |
74 | inode->i_mapping->a_ops = &bfs_aops; | |
75 | } | |
76 | ||
fac92bec AS |
77 | BFS_I(inode)->i_sblock = le32_to_cpu(di->i_sblock); |
78 | BFS_I(inode)->i_eblock = le32_to_cpu(di->i_eblock); | |
f433dc56 | 79 | BFS_I(inode)->i_dsk_ino = le16_to_cpu(di->i_ino); |
fac92bec AS |
80 | inode->i_uid = le32_to_cpu(di->i_uid); |
81 | inode->i_gid = le32_to_cpu(di->i_gid); | |
82 | inode->i_nlink = le32_to_cpu(di->i_nlink); | |
1da177e4 LT |
83 | inode->i_size = BFS_FILESIZE(di); |
84 | inode->i_blocks = BFS_FILEBLOCKS(di); | |
fac92bec AS |
85 | inode->i_atime.tv_sec = le32_to_cpu(di->i_atime); |
86 | inode->i_mtime.tv_sec = le32_to_cpu(di->i_mtime); | |
87 | inode->i_ctime.tv_sec = le32_to_cpu(di->i_ctime); | |
1da177e4 LT |
88 | inode->i_atime.tv_nsec = 0; |
89 | inode->i_mtime.tv_nsec = 0; | |
90 | inode->i_ctime.tv_nsec = 0; | |
1da177e4 LT |
91 | |
92 | brelse(bh); | |
e33ab086 DH |
93 | unlock_new_inode(inode); |
94 | return inode; | |
95 | ||
96 | error: | |
97 | iget_failed(inode); | |
98 | return ERR_PTR(-EIO); | |
1da177e4 LT |
99 | } |
100 | ||
f433dc56 | 101 | static int bfs_write_inode(struct inode *inode, int unused) |
1da177e4 | 102 | { |
fac92bec AS |
103 | unsigned int ino = (u16)inode->i_ino; |
104 | unsigned long i_sblock; | |
f433dc56 DV |
105 | struct bfs_inode *di; |
106 | struct buffer_head *bh; | |
1da177e4 | 107 | int block, off; |
3f165e4c | 108 | struct bfs_sb_info *info = BFS_SB(inode->i_sb); |
1da177e4 | 109 | |
fac92bec AS |
110 | dprintf("ino=%08x\n", ino); |
111 | ||
f433dc56 | 112 | if ((ino < BFS_ROOT_INO) || (ino > BFS_SB(inode->i_sb)->si_lasti)) { |
fac92bec | 113 | printf("Bad inode number %s:%08x\n", inode->i_sb->s_id, ino); |
1da177e4 LT |
114 | return -EIO; |
115 | } | |
116 | ||
3f165e4c | 117 | mutex_lock(&info->bfs_lock); |
f433dc56 | 118 | block = (ino - BFS_ROOT_INO) / BFS_INODES_PER_BLOCK + 1; |
1da177e4 LT |
119 | bh = sb_bread(inode->i_sb, block); |
120 | if (!bh) { | |
f433dc56 DV |
121 | printf("Unable to read inode %s:%08x\n", |
122 | inode->i_sb->s_id, ino); | |
3f165e4c | 123 | mutex_unlock(&info->bfs_lock); |
1da177e4 LT |
124 | return -EIO; |
125 | } | |
126 | ||
f433dc56 | 127 | off = (ino - BFS_ROOT_INO) % BFS_INODES_PER_BLOCK; |
1da177e4 LT |
128 | di = (struct bfs_inode *)bh->b_data + off; |
129 | ||
fac92bec AS |
130 | if (ino == BFS_ROOT_INO) |
131 | di->i_vtype = cpu_to_le32(BFS_VDIR); | |
1da177e4 | 132 | else |
fac92bec AS |
133 | di->i_vtype = cpu_to_le32(BFS_VREG); |
134 | ||
135 | di->i_ino = cpu_to_le16(ino); | |
136 | di->i_mode = cpu_to_le32(inode->i_mode); | |
137 | di->i_uid = cpu_to_le32(inode->i_uid); | |
138 | di->i_gid = cpu_to_le32(inode->i_gid); | |
139 | di->i_nlink = cpu_to_le32(inode->i_nlink); | |
140 | di->i_atime = cpu_to_le32(inode->i_atime.tv_sec); | |
141 | di->i_mtime = cpu_to_le32(inode->i_mtime.tv_sec); | |
142 | di->i_ctime = cpu_to_le32(inode->i_ctime.tv_sec); | |
143 | i_sblock = BFS_I(inode)->i_sblock; | |
144 | di->i_sblock = cpu_to_le32(i_sblock); | |
145 | di->i_eblock = cpu_to_le32(BFS_I(inode)->i_eblock); | |
146 | di->i_eoffset = cpu_to_le32(i_sblock * BFS_BSIZE + inode->i_size - 1); | |
1da177e4 LT |
147 | |
148 | mark_buffer_dirty(bh); | |
149 | brelse(bh); | |
3f165e4c | 150 | mutex_unlock(&info->bfs_lock); |
1da177e4 LT |
151 | return 0; |
152 | } | |
153 | ||
f433dc56 | 154 | static void bfs_delete_inode(struct inode *inode) |
1da177e4 LT |
155 | { |
156 | unsigned long ino = inode->i_ino; | |
f433dc56 DV |
157 | struct bfs_inode *di; |
158 | struct buffer_head *bh; | |
1da177e4 | 159 | int block, off; |
f433dc56 DV |
160 | struct super_block *s = inode->i_sb; |
161 | struct bfs_sb_info *info = BFS_SB(s); | |
162 | struct bfs_inode_info *bi = BFS_I(inode); | |
1da177e4 | 163 | |
fac92bec | 164 | dprintf("ino=%08lx\n", ino); |
1da177e4 | 165 | |
fef26658 MF |
166 | truncate_inode_pages(&inode->i_data, 0); |
167 | ||
f433dc56 | 168 | if ((ino < BFS_ROOT_INO) || (ino > info->si_lasti)) { |
fac92bec | 169 | printf("invalid ino=%08lx\n", ino); |
1da177e4 LT |
170 | return; |
171 | } | |
172 | ||
173 | inode->i_size = 0; | |
174 | inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC; | |
3f165e4c | 175 | mutex_lock(&info->bfs_lock); |
1da177e4 | 176 | mark_inode_dirty(inode); |
f433dc56 DV |
177 | |
178 | block = (ino - BFS_ROOT_INO) / BFS_INODES_PER_BLOCK + 1; | |
1da177e4 LT |
179 | bh = sb_bread(s, block); |
180 | if (!bh) { | |
f433dc56 DV |
181 | printf("Unable to read inode %s:%08lx\n", |
182 | inode->i_sb->s_id, ino); | |
3f165e4c | 183 | mutex_unlock(&info->bfs_lock); |
1da177e4 LT |
184 | return; |
185 | } | |
f433dc56 DV |
186 | off = (ino - BFS_ROOT_INO) % BFS_INODES_PER_BLOCK; |
187 | di = (struct bfs_inode *)bh->b_data + off; | |
188 | memset((void *)di, 0, sizeof(struct bfs_inode)); | |
189 | mark_buffer_dirty(bh); | |
190 | brelse(bh); | |
191 | ||
fac92bec | 192 | if (bi->i_dsk_ino) { |
7e46aa5c AV |
193 | if (bi->i_sblock) |
194 | info->si_freeb += bi->i_eblock + 1 - bi->i_sblock; | |
1da177e4 | 195 | info->si_freei++; |
fac92bec | 196 | clear_bit(ino, info->si_imap); |
1da177e4 | 197 | dump_imap("delete_inode", s); |
fac92bec | 198 | } |
1da177e4 | 199 | |
f433dc56 DV |
200 | /* |
201 | * If this was the last file, make the previous block | |
202 | * "last block of the last file" even if there is no | |
203 | * real file there, saves us 1 gap. | |
204 | */ | |
205 | if (info->si_lf_eblk == bi->i_eblock) { | |
206 | info->si_lf_eblk = bi->i_sblock - 1; | |
1da177e4 LT |
207 | mark_buffer_dirty(info->si_sbh); |
208 | } | |
3f165e4c | 209 | mutex_unlock(&info->bfs_lock); |
1da177e4 LT |
210 | clear_inode(inode); |
211 | } | |
212 | ||
213 | static void bfs_put_super(struct super_block *s) | |
214 | { | |
215 | struct bfs_sb_info *info = BFS_SB(s); | |
3f165e4c | 216 | |
e1f89ec9 ES |
217 | if (!info) |
218 | return; | |
219 | ||
8c85e125 CH |
220 | if (s->s_dirt) |
221 | bfs_write_super(s); | |
222 | ||
1da177e4 | 223 | brelse(info->si_sbh); |
3f165e4c | 224 | mutex_destroy(&info->bfs_lock); |
1da177e4 LT |
225 | kfree(info->si_imap); |
226 | kfree(info); | |
227 | s->s_fs_info = NULL; | |
228 | } | |
229 | ||
726c3342 | 230 | static int bfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 231 | { |
726c3342 | 232 | struct super_block *s = dentry->d_sb; |
1da177e4 LT |
233 | struct bfs_sb_info *info = BFS_SB(s); |
234 | u64 id = huge_encode_dev(s->s_bdev->bd_dev); | |
235 | buf->f_type = BFS_MAGIC; | |
236 | buf->f_bsize = s->s_blocksize; | |
237 | buf->f_blocks = info->si_blocks; | |
238 | buf->f_bfree = buf->f_bavail = info->si_freeb; | |
239 | buf->f_files = info->si_lasti + 1 - BFS_ROOT_INO; | |
240 | buf->f_ffree = info->si_freei; | |
241 | buf->f_fsid.val[0] = (u32)id; | |
242 | buf->f_fsid.val[1] = (u32)(id >> 32); | |
243 | buf->f_namelen = BFS_NAMELEN; | |
244 | return 0; | |
245 | } | |
246 | ||
247 | static void bfs_write_super(struct super_block *s) | |
248 | { | |
3f165e4c DV |
249 | struct bfs_sb_info *info = BFS_SB(s); |
250 | ||
251 | mutex_lock(&info->bfs_lock); | |
1da177e4 | 252 | if (!(s->s_flags & MS_RDONLY)) |
3f165e4c | 253 | mark_buffer_dirty(info->si_sbh); |
1da177e4 | 254 | s->s_dirt = 0; |
3f165e4c | 255 | mutex_unlock(&info->bfs_lock); |
1da177e4 LT |
256 | } |
257 | ||
f433dc56 | 258 | static struct kmem_cache *bfs_inode_cachep; |
1da177e4 LT |
259 | |
260 | static struct inode *bfs_alloc_inode(struct super_block *sb) | |
261 | { | |
262 | struct bfs_inode_info *bi; | |
e94b1766 | 263 | bi = kmem_cache_alloc(bfs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
264 | if (!bi) |
265 | return NULL; | |
266 | return &bi->vfs_inode; | |
267 | } | |
268 | ||
269 | static void bfs_destroy_inode(struct inode *inode) | |
270 | { | |
271 | kmem_cache_free(bfs_inode_cachep, BFS_I(inode)); | |
272 | } | |
273 | ||
51cc5068 | 274 | static void init_once(void *foo) |
1da177e4 LT |
275 | { |
276 | struct bfs_inode_info *bi = foo; | |
277 | ||
a35afb83 | 278 | inode_init_once(&bi->vfs_inode); |
1da177e4 | 279 | } |
20c2df83 | 280 | |
1da177e4 LT |
281 | static int init_inodecache(void) |
282 | { | |
283 | bfs_inode_cachep = kmem_cache_create("bfs_inode_cache", | |
284 | sizeof(struct bfs_inode_info), | |
fffb60f9 PJ |
285 | 0, (SLAB_RECLAIM_ACCOUNT| |
286 | SLAB_MEM_SPREAD), | |
20c2df83 | 287 | init_once); |
1da177e4 LT |
288 | if (bfs_inode_cachep == NULL) |
289 | return -ENOMEM; | |
290 | return 0; | |
291 | } | |
292 | ||
293 | static void destroy_inodecache(void) | |
294 | { | |
1a1d92c1 | 295 | kmem_cache_destroy(bfs_inode_cachep); |
1da177e4 LT |
296 | } |
297 | ||
ee9b6d61 | 298 | static const struct super_operations bfs_sops = { |
1da177e4 LT |
299 | .alloc_inode = bfs_alloc_inode, |
300 | .destroy_inode = bfs_destroy_inode, | |
1da177e4 LT |
301 | .write_inode = bfs_write_inode, |
302 | .delete_inode = bfs_delete_inode, | |
303 | .put_super = bfs_put_super, | |
304 | .write_super = bfs_write_super, | |
305 | .statfs = bfs_statfs, | |
306 | }; | |
307 | ||
f433dc56 | 308 | void dump_imap(const char *prefix, struct super_block *s) |
1da177e4 | 309 | { |
fac92bec | 310 | #ifdef DEBUG |
1da177e4 LT |
311 | int i; |
312 | char *tmpbuf = (char *)get_zeroed_page(GFP_KERNEL); | |
313 | ||
314 | if (!tmpbuf) | |
315 | return; | |
f433dc56 DV |
316 | for (i = BFS_SB(s)->si_lasti; i >= 0; i--) { |
317 | if (i > PAGE_SIZE - 100) break; | |
1da177e4 LT |
318 | if (test_bit(i, BFS_SB(s)->si_imap)) |
319 | strcat(tmpbuf, "1"); | |
320 | else | |
321 | strcat(tmpbuf, "0"); | |
322 | } | |
f433dc56 DV |
323 | printf("BFS-fs: %s: lasti=%08lx <%s>\n", |
324 | prefix, BFS_SB(s)->si_lasti, tmpbuf); | |
1da177e4 LT |
325 | free_page((unsigned long)tmpbuf); |
326 | #endif | |
327 | } | |
328 | ||
329 | static int bfs_fill_super(struct super_block *s, void *data, int silent) | |
330 | { | |
f433dc56 DV |
331 | struct buffer_head *bh; |
332 | struct bfs_super_block *bfs_sb; | |
333 | struct inode *inode; | |
fac92bec | 334 | unsigned i, imap_len; |
f433dc56 | 335 | struct bfs_sb_info *info; |
e33ab086 | 336 | long ret = -EINVAL; |
e1f89ec9 | 337 | unsigned long i_sblock, i_eblock, i_eoff, s_size; |
1da177e4 | 338 | |
f8314dc6 | 339 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
1da177e4 LT |
340 | if (!info) |
341 | return -ENOMEM; | |
342 | s->s_fs_info = info; | |
1da177e4 LT |
343 | |
344 | sb_set_blocksize(s, BFS_BSIZE); | |
345 | ||
346 | bh = sb_bread(s, 0); | |
347 | if(!bh) | |
348 | goto out; | |
349 | bfs_sb = (struct bfs_super_block *)bh->b_data; | |
fac92bec | 350 | if (le32_to_cpu(bfs_sb->s_magic) != BFS_MAGIC) { |
1da177e4 LT |
351 | if (!silent) |
352 | printf("No BFS filesystem on %s (magic=%08x)\n", | |
fac92bec | 353 | s->s_id, le32_to_cpu(bfs_sb->s_magic)); |
1da177e4 LT |
354 | goto out; |
355 | } | |
356 | if (BFS_UNCLEAN(bfs_sb, s) && !silent) | |
357 | printf("%s is unclean, continuing\n", s->s_id); | |
358 | ||
359 | s->s_magic = BFS_MAGIC; | |
1da177e4 | 360 | info->si_sbh = bh; |
e1f89ec9 ES |
361 | |
362 | if (le32_to_cpu(bfs_sb->s_start) > le32_to_cpu(bfs_sb->s_end)) { | |
363 | printf("Superblock is corrupted\n"); | |
364 | goto out; | |
365 | } | |
366 | ||
f433dc56 DV |
367 | info->si_lasti = (le32_to_cpu(bfs_sb->s_start) - BFS_BSIZE) / |
368 | sizeof(struct bfs_inode) | |
369 | + BFS_ROOT_INO - 1; | |
370 | imap_len = (info->si_lasti / 8) + 1; | |
f8314dc6 | 371 | info->si_imap = kzalloc(imap_len, GFP_KERNEL); |
1da177e4 LT |
372 | if (!info->si_imap) |
373 | goto out; | |
f433dc56 | 374 | for (i = 0; i < BFS_ROOT_INO; i++) |
1da177e4 LT |
375 | set_bit(i, info->si_imap); |
376 | ||
377 | s->s_op = &bfs_sops; | |
e33ab086 DH |
378 | inode = bfs_iget(s, BFS_ROOT_INO); |
379 | if (IS_ERR(inode)) { | |
380 | ret = PTR_ERR(inode); | |
1da177e4 LT |
381 | kfree(info->si_imap); |
382 | goto out; | |
383 | } | |
384 | s->s_root = d_alloc_root(inode); | |
385 | if (!s->s_root) { | |
386 | iput(inode); | |
e33ab086 | 387 | ret = -ENOMEM; |
1da177e4 LT |
388 | kfree(info->si_imap); |
389 | goto out; | |
390 | } | |
391 | ||
f433dc56 DV |
392 | info->si_blocks = (le32_to_cpu(bfs_sb->s_end) + 1) >> BFS_BSIZE_BITS; |
393 | info->si_freeb = (le32_to_cpu(bfs_sb->s_end) + 1 | |
394 | - le32_to_cpu(bfs_sb->s_start)) >> BFS_BSIZE_BITS; | |
1da177e4 LT |
395 | info->si_freei = 0; |
396 | info->si_lf_eblk = 0; | |
50682bb4 ES |
397 | |
398 | /* can we read the last block? */ | |
399 | bh = sb_bread(s, info->si_blocks - 1); | |
400 | if (!bh) { | |
401 | printf("Last block not available: %lu\n", info->si_blocks - 1); | |
402 | iput(inode); | |
403 | ret = -EIO; | |
404 | kfree(info->si_imap); | |
405 | goto out; | |
406 | } | |
407 | brelse(bh); | |
408 | ||
c2b513df | 409 | bh = NULL; |
f433dc56 | 410 | for (i = BFS_ROOT_INO; i <= info->si_lasti; i++) { |
c2b513df | 411 | struct bfs_inode *di; |
f433dc56 | 412 | int block = (i - BFS_ROOT_INO) / BFS_INODES_PER_BLOCK + 1; |
c2b513df | 413 | int off = (i - BFS_ROOT_INO) % BFS_INODES_PER_BLOCK; |
75b25b4c | 414 | unsigned long eblock; |
c2b513df AV |
415 | |
416 | if (!off) { | |
417 | brelse(bh); | |
418 | bh = sb_bread(s, block); | |
419 | } | |
420 | ||
421 | if (!bh) | |
422 | continue; | |
423 | ||
424 | di = (struct bfs_inode *)bh->b_data + off; | |
425 | ||
e1f89ec9 ES |
426 | /* test if filesystem is not corrupted */ |
427 | ||
428 | i_eoff = le32_to_cpu(di->i_eoffset); | |
429 | i_sblock = le32_to_cpu(di->i_sblock); | |
430 | i_eblock = le32_to_cpu(di->i_eblock); | |
431 | s_size = le32_to_cpu(bfs_sb->s_end); | |
432 | ||
433 | if (i_sblock > info->si_blocks || | |
434 | i_eblock > info->si_blocks || | |
435 | i_sblock > i_eblock || | |
436 | i_eoff > s_size || | |
437 | i_sblock * BFS_BSIZE > i_eoff) { | |
438 | ||
439 | printf("Inode 0x%08x corrupted\n", i); | |
440 | ||
441 | brelse(bh); | |
442 | s->s_root = NULL; | |
443 | kfree(info->si_imap); | |
444 | kfree(info); | |
445 | s->s_fs_info = NULL; | |
446 | return -EIO; | |
447 | } | |
448 | ||
c2b513df | 449 | if (!di->i_ino) { |
1da177e4 | 450 | info->si_freei++; |
c2b513df AV |
451 | continue; |
452 | } | |
453 | set_bit(i, info->si_imap); | |
454 | info->si_freeb -= BFS_FILEBLOCKS(di); | |
455 | ||
c2b513df | 456 | eblock = le32_to_cpu(di->i_eblock); |
f433dc56 | 457 | if (eblock > info->si_lf_eblk) |
c2b513df | 458 | info->si_lf_eblk = eblock; |
1da177e4 | 459 | } |
c2b513df | 460 | brelse(bh); |
1da177e4 | 461 | if (!(s->s_flags & MS_RDONLY)) { |
c2b513df | 462 | mark_buffer_dirty(info->si_sbh); |
1da177e4 LT |
463 | s->s_dirt = 1; |
464 | } | |
465 | dump_imap("read_super", s); | |
3f165e4c | 466 | mutex_init(&info->bfs_lock); |
1da177e4 LT |
467 | return 0; |
468 | ||
469 | out: | |
470 | brelse(bh); | |
471 | kfree(info); | |
472 | s->s_fs_info = NULL; | |
e33ab086 | 473 | return ret; |
1da177e4 LT |
474 | } |
475 | ||
454e2398 DH |
476 | static int bfs_get_sb(struct file_system_type *fs_type, |
477 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) | |
1da177e4 | 478 | { |
454e2398 | 479 | return get_sb_bdev(fs_type, flags, dev_name, data, bfs_fill_super, mnt); |
1da177e4 LT |
480 | } |
481 | ||
482 | static struct file_system_type bfs_fs_type = { | |
483 | .owner = THIS_MODULE, | |
484 | .name = "bfs", | |
485 | .get_sb = bfs_get_sb, | |
486 | .kill_sb = kill_block_super, | |
487 | .fs_flags = FS_REQUIRES_DEV, | |
488 | }; | |
489 | ||
490 | static int __init init_bfs_fs(void) | |
491 | { | |
492 | int err = init_inodecache(); | |
493 | if (err) | |
494 | goto out1; | |
495 | err = register_filesystem(&bfs_fs_type); | |
496 | if (err) | |
497 | goto out; | |
498 | return 0; | |
499 | out: | |
500 | destroy_inodecache(); | |
501 | out1: | |
502 | return err; | |
503 | } | |
504 | ||
505 | static void __exit exit_bfs_fs(void) | |
506 | { | |
507 | unregister_filesystem(&bfs_fs_type); | |
508 | destroy_inodecache(); | |
509 | } | |
510 | ||
511 | module_init(init_bfs_fs) | |
512 | module_exit(exit_bfs_fs) |